hwmon: (f75375s) Initialize pwmX_mode and pwmX_enable if there is no platform data

pwmX_mode and pwmX_enable are not initialized if no platform data is provided to
the driver. Read chip configuration at driver initialization time and initialize
attributes to reflect chip configuration.

Cc: Riku Voipio <riku.voipio@iki.fi>
Reviewed-by: Bjoern Gerhart <oss@extracloud.de>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>

1 files changed, 26 insertions, 2 deletions

diff --git a/drivers/hwmon/f75375s.c b/drivers/hwmon/f75375s.c
index 777a665164f9..9c3f078e263b 100644
--- a/drivers/hwmon/f75375s.c
+++ b/drivers/hwmon/f75375s.c
@@ -652,6 +652,31 @@ static void f75375_init(struct i2c_client *client, struct f75375_data *data,
                 struct f75375s_platform_data *f75375s_pdata)
 {
         int nr;
+
+        if (!f75375s_pdata) {
+                u8 conf, mode;
+                int nr;
+
+                conf = f75375_read8(client, F75375_REG_CONFIG1);
+                mode = f75375_read8(client, F75375_REG_FAN_TIMER);
+                for (nr = 0; nr < 2; nr++) {
+                        if (!(conf & (1 << FAN_CTRL_LINEAR(nr))))
+                                data->pwm_mode[nr] = 1;
+                        switch ((mode >> FAN_CTRL_MODE(nr)) & 3) {
+                        case 0:         /* speed */
+                                data->pwm_enable[nr] = 3;
+                                break;
+                        case 1:         /* automatic */
+                                data->pwm_enable[nr] = 2;
+                                break;
+                        default:        /* manual */
+                                data->pwm_enable[nr] = 1;
+                                break;
+                        }
+                }
+                return;
+        }
+
         set_pwm_enable_direct(client, 0, f75375s_pdata->pwm_enable[0]);
         set_pwm_enable_direct(client, 1, f75375s_pdata->pwm_enable[1]);
         for (nr = 0; nr < 2; nr++) {
@@ -703,8 +728,7 @@ static int f75375_probe(struct i2c_client *client,
                 goto exit_remove;
         }
 
-        if (f75375s_pdata != NULL)
-                f75375_init(client, data, f75375s_pdata);
+        f75375_init(client, data, f75375s_pdata);
 
         return 0;